Oil-dressing for leather.



train-oil is too thick to penetrate rapi latter.

i mains firmly invented certain new ments in Oil-Dressingsfor Leather, the following i i A standard leather-preservingoil which vleather is very porous.

rimrnn srArns PATENT orrion.

I HEINRICH SUHOWALTER, or LADEN-BURG, GERMANY.

OlL-DRESSlNG FOR LEATHER.

7 I I Application filed Octob r; all whom it may concern: Be it lrnorwn that I, HEINRICH SOHOWAL- ran, a citizen of the Empire of Germany resid ng at Ladenburg,

and useful Improveis aspecnication.

Y can act at the same time as an impregnating material must fulfil the following requirements: It must, first, be able'to penetrate easily into the leather without leaving a layer of fat behind or transpiring; secondly, it must hold well in the leather and must not be capable of being soaked out by air, water, steam, &c. thirdly, it-must make the leather permanently soft, flexible, and water-tight. According to this invention sucha leatherpreserving'oil is composed of a good train-oil to which has been added anilin oil and -'a solution of india-rubber in turpentine; Pure dlyirrto the leather. Moreover, it leaves a layer of grease and transpires, and also it does not remain in the leather, but can be easily driven out by water because. it islfghter than the B the addition of'anilin-oil and a solution 0 indie-rubber .in turpentine it is rendered-more limpid, penetrates immedi ately on application into the leather, and retherein. Air, have no influence upon the leather treated with this admixture o consequently remains permanently soft flexible, 'and-waterproof.

' 1' Experiments which have been made have roved that. when a three-per-cent. solution of india-rubber in t entine in a quantity of, say, ten liters was a dad to ninetyliters of a pure driven out of the leather b it remained permanently t and one-halfer cent. 0i anilin oil was 1nter'.-'

water, but that .mixed In t ese'experlments three bags of sheep-leather were made use of, because this The first bag, was

treated inside on the flesh side of the leather with train-oil, the second bag with tra n-oil to which a solution oirubber inturpentine of.

three per cent. was added, and the third bag was treated with train-oil to which-a suitable quantity of a three-per-cent. solution of rubher in turpentine and one andone-half per cent. of anilin-oil was added. Each bag was filled with water and suspended on the wall.

After a short time the water began to force Specification of Letters latent.

a 25,1905. s id No. 284,824:

Baden, Germany, haveof which ter for weeks.

the leather water-tight.

water, or steam.

- the leather treated t "materials. 7 The leather train-oil the mixture could still be erein ifonly'one Patented ma 22, 1906.

out the oilfrom the leather of the first bag The leather became very-oily on the outside,

and th s oil collected in great drops at the under part of the bag, which drops at first slowly, and subse uently more quickly, fell to the round unti all the oil was driven out of the eather and drop.

siderably longer time before the oil began to drop and the water followed it out of thebag,

but finally this bag also dropped until it was empty. Only the third bag retained the waoutside' of the sheep-leather bag and the leather remained soft and elastic. This result was very surprising acids present rather than specially to render The experiments, however, have, been repeated several times for the purpose of ascertaining in what manner the water-tight effect is produced-by the addition of 'anilin-oil-to train oil mixed with three-percent.-

because the anilin- 'oil was added primarily to counteract the bber solution in turpentine,

the water. itself began to I With the second bag itrequired con- 7 No oil was visible upon the and it has been discovered that by the addi is separated. It is pentine and 1 the rubber therefore lpossible that a similar action takes 5 4 of the rub- 'certained the nature of my said invention and in'what mannerlthe same is to be performed, I declare that what I claim is- 1, vAll improved preparation for the preservation and waterproofing of leather, conthickness of tion' of the'anilin this :combines with the turs to be proport1onately'in-- si'sting of train oil mixedwith a suitable quantity of a three-per-cent. solution of india-rubher in turpentine and one andone-half per cent. of ahilin-oil. J p j 2. A preparation for the-preservation and waterproofing of leather, consisting of a train-' oil-mixed with anilin-oil and a solution'of india-rubberin turpentine,

In testimony that I claim the my invention 1 have presence of two subscribing witnesses. v

HEINRIOHSCHOWALTER.

Witnessesi AUG. NErMi 'rUNG, Jos. H. Laura.

foregoing as signed. my name in roe 

